Siemens SIMATIC NET ET 200SP Operating Instructions Manual page 40

Installation, wiring, commissioning
3.1 Important notes on using the device
The equipment is designed for operation with Safety Extra-Low Voltage (SELV) by a
Limited Power Source (LPS).
This means that only SELV / LPS complying with IEC 60950-1 / EN 60950-1 / VDE 0805-1
must be connected to the power supply terminals, or the power supply unit for the
equipment power supply must comply with NEC Class 2, as described by the National
Electrical Code (r) (ANSI / NFPA 70).
If the equipment is connected to a redundant power supply (two separate power supplies),
both must meet these requirements.
EXPLOSION HAZARD
Do not connect or disconnect cables to or from the device when a flammable or
combustible atmosphere is present.
EXPLOSION HAZARD
Replacing components may impair suitability for Class 1, Division 2 or Zone 2.
When used in hazardous environments corresponding to Class I, Division 2 or Class I,
Zone 2, the device must be installed in a cabinet or a suitable enclosure.
DIN rail
In the ATEX and IECEx area of application only the Siemens DIN rail 6ES5 710-8MA11
may be used to mount the modules.
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WARNING
WARNING
WARNING
WARNING
WARNING
Operating Instructions, 12/2019, C79000-G8976-C426-05
CP 154xSP-1